the invention relates to a process for the manufacture of a grate (20) of concrete floor of livestock building, the slats (20) includes rails (21) connected by rails (22) and through holes (23), said method comprising at least the steps out ivantes.- pouring concrete (31) in a mold (50) to form suitable for forming the gratings (20).- vibrage of concrete (32) in the mold (50).- training of irregularities (33) of the surface of the grate (20) not covered by the mold (50), the formation of irregularities (33) is provided in the vibrage (32) of the concrete.- withdrawal of the mold (50) of the grate (20) of the grooved surface flaws.
